下半年大学英语六级阅读模拟试题3篇doc.docx

下半年大学英语六级阅读模拟试题3篇doc.docx

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下半年大学英语六级阅读模拟试题3篇doc

2018下半年大学英语六级阅读模拟试题3篇

2018下半年大学英语六级阅读模拟试题3篇

第一篇

Thefoodirradiationprocessisasimpleone.ThenewU.S.plant,VindicatorofFloridaIncorporatedinMulberry,Fla.,usesamaterialcalledcobalt60toirradiatefood.Cobalt60isradioactiveisotope（form）ofthemetallicelementcobalt.Cobalt60,whichgivesoffradiationintheformofgammarays,isalsousedforradiationtherapyforcancerpatientsandforsterilizinghospitalequipment.Theradioactiveisotopeiscreatedbybombardingcobaltwithsubatomicparticlesinanuclearreactor.However,irradiationplantsdonotthemselvescontainnuclearreactors.

Intheirradiationplant,foodisexposedtothinrodsofcobalt60.Therodsgiveoffgammarays,whichdisruptchemicalprocessesincontaminatingorganisms.Thedisruptionbreaksdownthecellwallsoforganismsordestroystheirgeneticmaterial.Thedose,setbytheU.S.FoodandDrugAdministration（FDA）,isenoughtokillorganismsonfood,butnotenoughtoproducesignificantchangesinthefooditself.

Althoughirradiationslightlydecreasesthenutritivevalueoffoods,thelossislessthanthatproducedbysomeothermethodsoffoodpreservation.Canning,forexample,resultsinamuchgreaterlossofnutrients.

Thosewhoobjecttoirradiationsaythattheprocessmaycreatesubstancesnotfoundinnonirradiatedfood.Sincethe1960sresearchershavestudiedirradiatedfoodatmicroscopiclevelstotrytofindsuchsubstances,calleduniqueradiolyticproducts.Afterreviewingthesestudies,theFDAdeterminedthatcompoundsformedduringirradiationaresimilartosubstancefoundinnonirradiatedfoodsandarenotdangeroustoconsume.

Destructionofmicroorganismsthatcauseillnessisanimportantgoalofirradiation.About250millioncasesoffoodpoisoningor1perpersonoccureveryyearintheU.S.,accordingtoFDAestimates.Foodpoisoningcancausevomiting,diarrhea,fever,headacheand,occasionally,death.

Becauseoftheapparentsafetyoffoodirradiation,andtheproblemspresentedbycontaminatedfood,scientificgroupsincludingtheAmericanMedicalAssociation,theWorldHealthOrganization,andtheUnitedNationsfoodandAgricultureAssociationhavevoicednearlyuniversalsupportfortheprocess.Worldwide,38nationshaveapprovedirradiationfor355products.

Likemicrowaveovens,foodirradiationhasarousedapprehensionandmisunderstanding.Yetithasbeenscrutinizedmorethoroughlythanothermethodsoffoodtreatmentthatwehavecometoregardassafe,anditappearstobeamethodwhosetimehascome.

1.Cobalt60,besidesirradiatingfood,isalsoemployedto___.

A.detectmetallicflaws

B.runanuclearreactor

C.curecancerpatients

D.strengthenconcretewalls

2.Gammaraysusedtoirradiatefood___.

A.aregenerallynotstrongenoughtodestroycontaminatingorganisms

B.donotbringaboutsignificantchangesinthefooditself

C.maydestroysomeofthenutrientsinthefood

D.shouldbesubmittedtoFDAforapproval

3.Irradiatedfood___.

A.certainlylosesitsnutritivevalue

B.maintainsitsnutritivevaluenodifferentfromthenonirradiated

C.keepsitsnutritivevaluebetterthancannedfood

D.isrecommendedasthebestofallpreservedfoods

4.Withcasesoffoodpoisoningincreasing,___.

A.foodirradiationshouldbecarriedoutwithcare

B.itismoreurgenttoirradiatefoods

C.medicalresearchesintotreatmentofthediseasedshouldbestrengthened

D.Americansarebeginningtoacceptfoodirradiation

5.Thepassagemaybetakenfrom___.

A.anewsreport

B.atextbookoffoodprocessing

C.abookofpopularscience

D.amanualoffoodirradiation

答案：

CBCCD

第二篇

IliveinthelandofDisney,Hollywoodandyear-roundsun.Youmaythinkpeopleinsuchaglamorous,fun-filledplacearehappierthanothers.Ifso,youhavesomemistakenideasaboutthenatureofhappiness.

Manyintelligentpeoplestillequatehappinesswithfun.Thetruthisthatfunandhappinesshavelittleornothingincommon.Funiswhatweexperienceduringanact.Happinessiswhatweexperienceafteranact.Itisadeeper,moreabidingemotion.

Goingtoanamusementparkorballgame,watchingamovieortelevision,arefunactivitiesthathelpusrelax,temporarilyforgetourproblemsandmaybeevenlaugh.Buttheydonotbringhappiness,becausetheirpositiveeffectsendwhenthefunends.

IhaveoftenthoughtthatifHollywoodstarshavearoletoplay,itistoteachusthathappinesshasnothingtodowithfun.Theserich,beautifulindividualshaveconstantaccesstoglamorousparties,fancycars,expensivehomes,everythingthatspellshappiness.Butinmemoiraftermemoir,celebritiesrevealtheunhappinesshiddenbeneathalltheirfun:

depression,alcoholism,drugaddiction,brokenmarriages,troubledchildrenandprofoundloneliness.

Askabachelorwhyheresistsmarriageeventhoughhefindsdatingtobelessandlesssatisfying.Ifheshonest,hewilltellyouthatheisafraidofmakingacommitment.Forcommitmentisinfactquitepainful.Thesinglelifeisfilledwithfun,adventureandexcitement.Marriagehassuchmoments,buttheyarenotitsmostdistinguishingfeatures.

Similarly,couplesthatchoosenottohavechildrenaredecidinginfavorofpainlessfunoverpainfulhappiness.Theycandineoutevertheywantandsleepaslateastheywant.Coupleswithinfantchildrenareluckytogetawholenightssleeporathree-dayvacation.Idontknowanyparentwhowouldchoosethewordfuntodescriberaisingchildren.

Understandingandacceptingthattruehappinesshasnothingtodowithfunisoneofthemostliberatingrealizationswecanevercometo.Itliberatestime:

nowwecandevotemorehourstoactivitiesthatcangenuinelyincreaseourhappiness.Itliberatesmoney:

buyingthatnewcarorthosefancyclothesthatwilldonothingtoincreaseourhappinessnowseemspointless.Anditliberatesusfromenvy:

wenowunderstandthatallthoserichandglamorouspeopleweweresosurearehappybecausetheyarealwayshavingsomuchfunactuallymaynotbehappyatall.

1.Whichofthefollowingistrue?

A.Funcreateslong-lastingsatisfaction.

B.Funprovidesenjoymentwhilepainleadstohappiness.

C.Happinessisenduringwhereasfunisshort-lived.

D.Funthatislong-standingmayleadtohappiness.

2.Totheauthor,Hollywoodstarsallhaveanimportantroletoplaythatisto__.

A.ritememoiraftermemoirabouttheirhappiness.

B.tellthepublicthathappinesshasnothingtodowithfun.

C.teachpeoplehowtoenjoytheirlives.

D.bringhappinesstothepublicinsteadofgoingtoglamorousparties.

3.Intheauthorsopinion,marriage___.

A.affordsgreaterfun.

B.leadstoraisingchildren.

C.indicatescommitment.

D.endsinpain.

4.Coupleshavinginfantchildren___.

A.areluckysincetheycanhaveawholenightssleep.

B.findfunintuckingthemintobedatnight.

C.findmoretimetoplayandjokewiththem.

D.derivehappinessfromtheirendeavor.

5.Ifonegetthemeaningofthetruesenseofhappiness,hewill__.

A.stopplayinggamesandjokingwithothers.

B.makethebestuseofhistimeincreasinghappiness.

C.giveafreehandtomoney.

D.keephimselfwithhisfamily.

答案：

CBCDB

第三篇

FederalReserveSystem,centralbankingsystemoftheUnitedStates,popularlycalledtheFed.Acentralbankservesasthebankertoboththebankingcommunityandthegovernment;italsoissuesthenationalcurrency,conductsmonetarypolicy,andplaysamajorroleinthesupervisionandregulationofbanksandbankholdingcompanies.IntheU.S.thesefunctionaretheresponsibilitiesofkeyofficialsoftheFederalReserveSystem:

theBoardofGovernors,locatedinWashington,D.C.,andthetopofficersof12districtFederalReservebanks,locatedthroughoutthenation.TheFedsactions,describedbelow,generallyhaveasignificanteffectonU.S.interestratesand,subsequently,onstock,bond,andotherfinancialmarkets.

TheFederalReservesbasicpowersareconcentratedintheBoardofGovernors,whichisparamountinallpolicyissuesconcerningbankregulationandsupervisionandinmostaspectsofmonetarycontrol.TheboardenunciatestheFedspoliciesonbothmonetaryandbankingmatter.Becausetheboardisnotanoperatingagency,mostoftheday-todayimplementationofpolicydecisionsislefttothedistrictFederalReservebanks,stockinwhichisownedbythecommercialbanksthataremembersoftheFederalReserveSystem.Ownershipinthisinstance,however,doesnotimplycontrol;theBoardofGovernorsandtheheadsoftheReservebanksorienttheirpoliciestothepublicinterestratherthantothebenefitoftheprivatebankingsystem.

TheU.S.bankingsystemsregulatoryapparatusiscomplex;theauthorityoftheFederalReserveissharedinsomeinstancesforexample,inmergersortheexaminationofbankswithotherFederalDepositInsuranceCorporation（FDIC）.Inthecriticalareaofregulatingthenationsmoneysupplyinaccordancewithnationaleconomicgoals,however,theFederalReserveisindependentwithinthegovernment,IncomeandexpendituresoftheFederalReservebanksandoftheboardofgovernorsarenotsubjecttothecongressionalappropriationprocess;theFederalReserveisself-financing.Itsincome（$20.2billionin1992）comesmainlyfromReservebankholdingsofincome-earningsecurities,primarilythoseoftheU.S.government.Outlays（$1.5billionin1992）aremostlyforoperationalexpensesinprovidingservicestothegovernmentandforexpendituresconnectedwithregulationandmonetarypolicy.In1992theFederalReservereturned416.8billioninearningstotheU.S.treasury.

1.TheFedoftheUnitedStates___.

A.functionasChinaBank

B.isthecounterpart